CRUCIFER^. 21 



coraequick and Prospect, 1876. Sparingly in a field of turnips 

 near Buckland Abbey, 1875. 

 IV. A few plants (apparently this, but with the characteristic early 

 root-leaves wanting) near Egg Buckland, November, 1877. 

 One m a field of vegetables near Laira, 1877. 

 V. Wembury ; a few plants on the side of a low cliff, 1878 ; again 

 in pasture land above the High Chffs, 1879. In considerable 

 quantity in a field of turnips near Yeo, 1870 ; one plant by 

 roadside there, 1879. 

 Tliis var. c. is an annual plant, with grass green, more or less hispid 

 root-leaves, of which Mr. Watson says, " I am tempted to call it the 

 wild stock (not the wild state) of the turnip ; " and except that it is 

 annual, and has a fusiform root, it certainly has no good characters 

 whereby to distinguish it from the cultivated turnip. Some of the 

 Torpomt specimens had in June, 1872, run up so quickly into flower that 

 few or no root-leaves were developed ; but cultivation of the plant thence 

 has since proved that normally its first root-leaves are characteristic of 

 the var. Briggsii. {See Jour. Bot. ii. N. S. 99, 100.) Probably this is 

 often misnamed B. Napus. 



B. Najncs, Bajje, and B. Rutabaga, Swede, only occur as remnants of 

 a crop. 



DIPLOTAXIS, B.C. 



41. D. tenuifolia, B.C. Fine-leaved Wall Mustard. 



Denizen ; on limestone rubble and old walls. Very rare. June 

 to October. 



c. II. [New Bridge ; C. A. Johns, Jacob. Fl. part 13. No recent 

 record. ] 



D. IV. Plentifully in Catdowii (Cattedown) quarries ; Jacob, ibid. In 

 profusion on walls about Plymouth ; Catsdo^Mi (Cattedown) 

 quarries, on the rubbish heaps, W. A. Brom field, MS. m N. 

 Bot. Guide, ii. 551. (Here probably confused with the large 

 form of D. muralis.) Still on the wall of an old lime-kiln at 

 Cattedown, and also on the rubbish -heaps in two or three 

 spots ; but not general there. Two plants in the old ship- 

 building yard at Turnchapel, 1873. 

 First record : Jacob, 1836. 



42. D. muralis, B.C. Wall or Sand Mustard. 



Colonist probably ; on walls and banks in waste spots, and as a 

 garden weed. Rather rare, and decidedly local ; but apparently 

 extencUng its area. May to October, 

 c. I. Two plants in a waste spot by an old quarry between Tideford 

 and Heskyn Mill, June, 1876. 

 II. Two or three by a roadside at Torpoint, August, 1871. 



